Plug-ins are loved and detested at the same time. Analogue-based sound engineers find them clinical and unnatural, while for in-the-box* producers, plug-ins offer access to eye-wateringly expensive studio hardware without actually having to fork out thousands of pounds, making them infinitely useful. Guest-blogger Daan van Dreumel is here to tell you which plug-ins are a must-have for pro-grade music production, how they work and to which bit of legendary kit they owe their name and fame.